Equations  
Summary 
an equation is made up of two expressions and an equals sign. to solve an equation, the value or values of the variable must be found that make both sides of the equation have the same value. there are several types of equations and several methods of solving them. when solving equations each step should be written on a new line, and the equals signs should be kept directly underneath each other.

Key Skills 

Vocabulary 
equation, linear equation, expression, variable, solution set. 